Stencil



www mmm../|W..wmmmww...1.wnm..

L. H. CARUFELL STENCIL Filed March 21, 1925 Nov. 3l 1925.

Patented Nov. 3, 1925.

UNITED STATES LOUIS H. CARUFEL, OF BISMARCK, NORTH DAKOTA.

STENGIL.

Application filed March 21, 1925. Serial No. 17,286.

To all whom t may concern:

Be it known that I, LOUIS H. CARUFEL, a

citizen of the United States, residing at Bismarck, in the county of Burleigh and State of North Dakota, have invented certain new and useful Improvements in Stencils, of which the following is a specification, reference being had to the accompanying drawings'.

This invention relates to certain improvements in stencils and has relation more particularly to devices of this general character particularly designed and adapted for use in connection with sand dusting screens ofthe type disclosed in my pending application Serial No. 701,782, filed March 25, 1924, wherein stencils embodying the present invention are disclosed but not claimed, and itis an object of the invention to provide a stencil with a reinforcement to keep the Same from spreading when the stencil is subjected to the force of a sand blast.

Another object of the invention is to pro-' vide a stencil with a reinforcement embedded in the bottom or cutting portion thereof to maintain the stencil against distortion and to prevent the sand blast disiguring the object being. worked upon or to produce an irregular copy.

An additional object of the invention is to provide a stencil having an opening cut therein to produce a desired letter, character or symbol which is further produced by a piece positioned within lsaid opening together with means for maintaining said piece in assembled relation without hinderance or obstruction being offered to the required action of the sand blast.

The invention consists in the details of construction and in the combination and arrangement of the several lparts of my improved stencil whereby certain important advantages are `attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novelfeatures of my invention will.

hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, whereinz- Figure 1 is a view in plan illustrating a that a stencil will be similarly v'stencil constructed in accordance with anv embodiment of my invention;

Figure 2 is a sectional view taken substantially on the line 2 2 of Figure 1;

Figure 3 is a view in plan of a stencil constructed in accordance with a further embodiment of my invention;

Figure 4 is a sectional view taken substantiallyon the line 1-4 of Figure 3;

4 Figure 5 is a view in plan of a stencil constructed in accordance with a still further embodiment of my invention;

Figure 6 is a view in side elevation illustrating the form of my improved-stencil before being applied to the work.

As disclosed in the accompanying draw` ings, 16 denotes a stencil preferably made of rubber and of a type particularly adapted for use in connection with a sand dusting screen as disclosed in my pending application Serial No. 7 01,7 82, filed March 24, 1924. Each of the stencils 16 has embedded therein a reinforcement 1 preferably wire strands of requisite gauge extending along the opposite sides ofthe stencil and set in the bottom or cutting face portion of the stencil or that face portion which engages-the object to be cutby the sand blast. The reinforcement 1 serves to hold the stencil from spreading especially When subjected to the force of the sand blast whereby `olisiiguring of the object or the Work is avoided as is also an irregular cutting.

ment 1a is continued entirely around the stencil 16. The stencil 162L has a suitable opening a cut therein to produce the desired letter, character or symbol, such letter, character or symbol being furthei` produced through the means of a center piece 2 positioned in the opening a. This center piece 2 is held in applied position by the tie or bridge pin 3, the portions of said pin disposed across the resultant opening being provided with a-covering 19 of rubber so that effective resistance will be offered to the sand blast 'to prevent cutting of said tie or bridge pin. While Figure 3 shows a stencil to reproduce the letter O, it is to be understood constructed in connection with the letters A, P and the like.

. .n It is also to be understood that the tie or from the under surface of the stencil to permit the sand blast to flow therebeneath so that no hinderance or obstruction Will be- -offered to the requisite cutting action of the blast. D

' The use of the reinforcements l and l permit the stencil when it comes out of the mold .to be slightly bentl and maintained structed in accordance with my invention is particularly Well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it Will also be obvious that my invention is susceptible of some change and modication Without departing from the principles and spirit thereof and. for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim 1. A stencilI for a sand blasting screen having an opening, a piece arranged within said o ening, a tie pin disposed through the `stenci and the piece, and a rubber coating for the portion of the pin bridging the space between the piece and stencil.

2. A stencilV for a sand blasting screen having an opening, a piece arranged Within said opening, a tie pin disposed through the stencil and the piece, and a rubber coating for the portion of the pin bridging the space between thepiece and stencil, said tie pin being arranged adjacent to the upper surface of the stencil and piece.

3. A stencil for a sand blasting screen having an opening, a piece arranged within said opening, a tie pin disposed through the stencil and the piece, and a coatin of sand resisting material for the portion o the pin bridging the space between the piece and stencil.

4. In combination with a rubber stencil for a sand blasting screen, a reinforcement embedded Within the stencil and extending along the sides thereof.

5. In combination with a rubber stencil for a sand blasting screen, a reinforcement embedded Within the stencil and extending along the sides thereof adjacent the inner face of the stencil.

6. In combination with a rubber stencil fora sand blasting screen, a reinforcement embedded therein and extending around the marginal portions thereof, said rein'- 'forcement being positioned adjacent the inner face of the stencil.

,In testimony whereof I hereunto aix my signature.

LOUIS H. CARUFEL. 

